/* Extract all integers from string */
#include <iostream>
#include <sstream>
using namespace std;

void extractIntegerWords(string str)
{
    stringstream ss;

    /* Storing the whole string into string stream */
    ss << str;

    /* Running loop till the end of the stream */
    string temp;
    int found;
    while (!ss.eof())
    {

        /* extracting word by word from stream */
        ss >> temp;

        /* Checking the given word is integer or not */
        if (stringstream(temp) >> found)
            cout << found << " ";

        /* To save from space at the end of string */
        temp = "";
    }
}

// Driver code
int main()
{
    string str;
    cin >> str;
    extractIntegerWords(str);
    getchar();getchar();
    return 0;
}
